import numpy as np


def OR(x1, x2):
	x = np.array([x1, x2])
	w = np.array([0.5, 0.5])
	b = -0.2
	tmp = np.sum(w*x) + b
	if tmp <= 0:
		return 0
	else:
		return 1
	
if __name__ == '__main__':
	for xs in [(0, 0), (1, 0), (0, 1),(1, 1)]:
		y = OR(xs[0],xs[1])
		print(str(xs) + " -> " + str(y))
